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1. 发明授权

US5353346A Multi-frequency signal detector and classifier 失效
标题翻译：多频信号检测器和分类器
公开(公告)号：US5353346A
公开(公告)日：1994-10-04
申请号：US994910
申请日：1992-12-22
申请人： Neil B. Cox , Edwin L. Froese
发明人： Neil B. Cox , Edwin L. Froese
IPC分类号： H04Q1/457 , H04M1/00
CPC分类号： H04Q1/4575
摘要： A method and apparatus for detecting and classifying signals that are the additive combination of a few constant-amplitude sinusoidal components, herein called N-tones. The attributes of this method and apparatus include provision of superior classification performance with an algorithm of low computational complexity. The method includes filtering to remove extraneous signal components, separation of the incoming signal into one or more output streams and segmenting these output streams into blocks of successive data samples. The magnitude of the data within each block is estimated along with the frequencies of the dominant spectral components. The frequency estimates are then used as part of the configuration process of a set of notch filters for removal of the identified dominant spectral components. The newly-configured notch filters are then applied to the same data blocks and the magnitudes of their outputs are estimated. The estimated magnitudes from before and after the notch filtering are then passed on to a block classifier along with the aforementioned frequency estimates. This block classifier tests its inputs to ascertain if the input signal conforms to prespecified conditions of tonal purity, absolute component magnitude, relative component magnitude and component frequency. Finally, a timing classifier is applied to monitor the time course of block classifications and test the candidate N-tones for conformance with application-specific requirements regarding signal persistence and longevity.
摘要翻译：一种用于检测和分类作为几个恒定幅度正弦分量（这里称为N音）的加和组合的信号的方法和装置。该方法和装置的属性包括使用低计算复杂度的算法来提供优越的分类性能。该方法包括滤波以去除外来信号分量，将输入信号分离成一个或多个输出流并将这些输出流分段成连续数据样本的块。每个块内的数据的幅度与主要谱分量的频率一起被估计。然后，频率估计被用作用于去除所识别的主要谱分量的一组陷波滤波器的配置过程的一部分。然后将新配置的陷波滤波器应用于相同的数据块，并估计其输出的幅度。然后将陷波滤波之前和之后的估计幅度与上述频率估计一起传递到块分类器。该块分类器测试其输入，以确定输入信号是否符合音调纯度，绝对分量幅度，相对分量幅度和分量频率的预先指定条件。最后，应用定时分类器来监视块分类的时间过程，并测试候选N音，以符合与信号持久性和使用寿命有关的应用特定要求。

2. 发明授权

US6167048A Clock recovery for video communication over ATM network 失效
标题翻译：通过ATM网络进行视频通信的时钟恢复
公开(公告)号：US6167048A
公开(公告)日：2000-12-26
申请号：US921553
申请日：1997-09-02
申请人： Randy A. Law , Neil B. Cox , Edwin L. Froese
发明人： Randy A. Law , Neil B. Cox , Edwin L. Froese
IPC分类号： H04J3/06 , H04L7/06 , H04L12/70 , H04N19/61 , H04J3/14 , H04L7/00
CPC分类号： H04L12/5601 , H04J3/0664 , H04L2012/5674
摘要： A method of clock recovery from a fast packet switched asynchronous network wherein a time stamp is transmitted over a network that has variable delay, involves maintaining an input counter at a sending device. The counter has a value dependent on an input clock. The value of the input counter is periodically transmitted over the network to a receiving device. A local counter at a receiving device has a value dependent on a local clock. The received value sample x.sub.i is compared with the local sample y.sub.i to derive the difference e.sub.i. The local clock frequency f.sub.j is adjusted such that the average of Emin.sub.j, where Emin.sub.j is the minimum of a block of error samples e.sub.i, remains close to a predetermined value, preferably zero. The clock recovery method is particularly suitable for MPEG2 video transmitted over ATM.
摘要翻译：一种从快速分组交换异步网络进行时钟恢复的方法，其中时间戳通过具有可变延迟的网络发送，包括在发送设备处维护输入计数器。计数器的值取决于输入时钟。输入计数器的值通过网络周期性地发送到接收设备。接收设备的本地计数器具有取决于本地时钟的值。将接收到的值样本xi与局部样本yi进行比较以得出差异ei。调整本地时钟频率fj，使得Eminj的平均值，其中Eminj是误差样本ei的块的最小值，保持接近预定值，优选为零。时钟恢复方法特别适用于通过ATM传输的MPEG2视频。

3. 发明授权

US5949864A Fraud prevention apparatus and method for performing policing functions for telephone services 失效
标题翻译：用于执行电话业务的警务功能的防诈骗装置和方法
公开(公告)号：US5949864A
公开(公告)日：1999-09-07
申请号：US848431
申请日：1997-05-08
申请人： Neil B. Cox
发明人： Neil B. Cox
IPC分类号： H04M3/36 , H04M1/66 , H04M3/42
CPC分类号： H04M15/47 , H04M3/36 , H04M2215/0148
摘要： An apparatus and method is disclosed for performing policing functions for specialized telephone services, and for mitigating fraudulent usage of such services in ubiquitous telephone networks that carry voice, facsimile or voice-band-data traffic. Signal processing is used to determine the properties of traffic present on a channel at a given point in time, and actions are conditionally imposed based on such traffic properties. A first embodiment of the invention can be applied to prevent fraudulent use of telephone services through suppression of an answer supervision response. A second embodiment of the invention can also be applied for regulation of access to specialized telephone services which depend on the manner of customers' use of such services.
摘要翻译：公开了一种用于执行专用电话服务的监管功能以及用于减轻这种服务在承载语音，传真或语音带数据业务的普遍存在的电话网络中的欺诈性使用的装置和方法。信号处理用于确定在给定时间点上在信道上存在的业务的属性，并且基于这种业务属性有条件地施加动作。本发明的第一实施例可以应用于通过抑制应答监督响应来防止欺诈性地使用电话服务。本发明的第二个实施例也可以应用于依赖于客户使用这种服务的方式来访问专门的电话服务。

4. 发明授权

US06574321B1 Apparatus and method for management of policies on the usage of telecommunications services 失效
标题翻译：管理电信业务使用政策的手段和方法
公开(公告)号：US06574321B1
公开(公告)日：2003-06-03
申请号：US09285446
申请日：1999-04-02
申请人： Neil B. Cox , Cameron Young
发明人： Neil B. Cox , Cameron Young
IPC分类号： H04M106
CPC分类号： H04M3/36 , H04M15/47 , H04M2215/0148
摘要： This invention allows enterprises to achieve specific objectives in the management and enforcement of policies related to the use of telecommunications services. It was conceived for use in connection with traditional telephone networks that carry voice, facsimile or voice-band-data (VBD) traffic, though it is not necessarily limited to such networks. It involves measurement of the properties of traffic on a communications channel, and the use of such knowledge in combination with various ancillary properties of telecommunications service usage to guide the conditional performance of prescribed actions based on user-defined policies. The measured traffic properties include classification of the type of traffic, where the set of possible classes include zero or more classes selected from a group of general categories comprising Voice, Facsimile, Voice-Band-Data, DTMF, Audible Network Signaling, Facsimile Handshaking, Voice-Band-Data Handshaking, Silence and Unknown. The ancillary properties may include network control parameters such as the apparent on-hook and off-hook state of the communications channel, the calling number, the called number, the side of the channel that originated the call, the side of the channel that is the dominant source of traffic for the call, the elapsed time since a call starts, and the time or day. The prescribed actions may include imposition of a recorded voice message, blockage of traffic on the communications channel, forced call termination through intervention with network signaling, direct notification of security personnel, generation of alarms, generation of call detail records, or other actions. The prescribed actions may also involve selecting or configuring a downstream telecommunications service for carriage of traffic with the observed traffic properties.
摘要翻译：本发明允许企业在管理和执行与使用电信业务有关的政策方面达成具体目标。它被设想用于传送语音，传真或语音频带数据（VBD）业务的传统电话网络，尽管它不一定限于这样的网络。它涉及测量通信信道上业务的属性，以及使用这些知识结合电信业务使用的各种辅助属性来指导基于用户定义策略的规定动作的条件性能。测量的业务属性包括业务类型的分类，其中可能类的集合包括从包括语音，传真，语音带数据，DTMF，声音网络信令，传真握手等的一般类别组中选择的零个或多个类别，语音带数据握手，静音和未知。辅助属性可以包括网络控制参数，例如通信信道的明显挂机状态和摘机状态，主叫号码，被叫号码，发起呼叫的信道侧，信道侧呼叫流量的主要来源，呼叫开始以来的经过时间，以及时间或日期。规定的动作可以包括录制的语音消息，阻塞通信信道上的业务，通过网络信令的干预强制呼叫终止，安全人员的直接通知，警报的产生，呼叫详细记录的产生或其他动作。规定的动作还可以涉及选择或配置下游电信服务以便运行具有所观察的业务属性的业务。

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